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“Price Levels and Economic Growth: Making Sense of Revisions to Data on Real Incomes”: A Comment

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In his recent paper, Ravallion (2013) proposes a new method to predict changes in purchasing power parities (PPPs), arguing that a model that includes economic growth and exchange rate movements is superior to the standard approach of using inflation differences. In this comment, I argue that his test is wrong and I show that with a correct specification of the test, there is no robust and stable relationship between changes in PPPs and economic growth while the usefulness of the standard approach is confirmed. I also suggest an approach that could be more helpful to understand changes in PPPs.
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Document Type: Research Article

Publication date: December 1, 2013

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